John l



(No Model.)

J. L. SARDY 8c CLN. COLE S.

THERMOMETER.

Patented Dec. 22, 1885.

WITNESSES UNITED STATES PATENT OFFICE.

JOHN L. SARDY AND CHARLES N. OOLES, OF NEW YORK, N. Y.

THERMOMETER.

SPECIFICATION forming part of Letters Patent No. 332,947, dated December22, 1885.

Application filed June 2, 1885. Serial No. 167,425. (No model.)

To all whom it may concern:

Be it known that we, JOHN L. SARDY and CHARLES N. COLES, residing at NewYork, in the county and State of New York, have invented certain new anduseful Improvements in Thermometers, of which the following is aspecification.

Our invention relates more particularly to the scale-plate and easing orframe of the thermometer, and aims at compactness and durability ofconstruction, and contemplates producing a cheaper article ofmanufacture than any now on the market.

Our invention consists in constructing the aforesaid scale-plate andframe of a single piece of metal,and forming integrally therewith thetop, bottom, and side flanges in such a manner as that they will affordcomplete protection to the tube and bulb.

Our invention also provides a slit in the face of the scale-plate andframe, through which the position of the sensitive fluid within the tubemay be observed, the said tube being placed in the rear of this plateand contiguous to the slit. The thermometer-tube, though attached to therear of the scale plate. is so arranged as that it will protrude beyondthe exposed surface of said plate, so as to permit the lights having aneasier access to the same. The tube is attached tothe frame by suit-ablewire rings. and the whole construction is of such a nature that they canbe made very cheap, and easily and quickly assembled.

Referring to the accompanying drawings, Figure 1 represents a face viewof our invention. Fig. 2 is a side View looking from the rear. Fig. 3 isa cross-section on the liner :0, Fig. 1. Fig. 4 is a cross-section onthe line 3 y. A represents the scale-plate,having the side flanges, A,and the top and bottom flange, a. These parts, taken together,constitute the frame or casing of the thermometer, they being stampedand cut from a single piece of metal, and are consequently integrallyformed, as will be described. The top and bottom flanges, a, areprovided with openings 0 for the purpose of ventilating the interior ofthe casing. The upper opening, 0, is also utilized as a means forsuspending the instrument on the wall, the hook or nail being insertedin it. This arrangement presents an additional advantage, in view of thefact that we contemplate, besides lithographing or printing the scaleupon the face of the casing, of utilizing it by the same process foradvertisement purposes, and the dispensing with the hole in the saidface will secure for such means an uninterrupted space in the upper partof the instrument. The tube T is set against the frame from the rear,and it finds a seating in the hollow receptacles stamped up from thebody of the scale-plate or face. The detail view in Fig. 3 representsthe respective positions of the parts in this respect. The bulb T isslightly bent from the alignment of the tube proper, and in such amanner that it will not be in contact with the rear surface of thecasing. The position of the mercury or other sensitive fluid is observedthrough the slit, and the tube is so arranged that by virtue of theoffsets or receptacles B the said tube projects beyond the surface ofthe scale-plate, and is thus the more easily read, being more exposed tothe light.

The tube is secured to the frame by means of rings D, which encircle thetube and are threaded through openings in the plate. We may also apply aprotecting-shield and a refleeting-surface, E, on the back of the tubeT.

Having thus described our invention, what we claim as new therein, anddesire to secure by Letters Patent, is-

1. A thermometer-case formed of a single piece of metal, and having thetop, bottom, and side flanges turned back from the face or scale-plate,in combination with the tube fastened in the rear of the said plate, asshown and described, and for the purpose set forth.

2. In combination with the thermometercasing, formed of a single pieceof metal provided with a longitudinal opening, as described, the tubefastened to the rear of the scale-plate and projecting through theopening, as set forth.

3. Thethermometer-casing,formed substantially as described, and having aslit or longitudinal opening in the face thereof, in combination withthe tube attached to the casing, contiguous to and directly behind theslit, whereby the tube and its bulb are thoroughly protected and thereadings easily made.

4. The thermometer-casing A, having the and the attaching-rings D, theshield or guard flanges A and a, the ofl'sets or receptacles B, E, forthe purposes described. and the slit or opening 0, with the thermome-JOHN L. SARDY. ter-tube T and attachln -r1ngs D as set forth 5 and showng 1 CHARLES N. GOLES.

5. In combination with the casing A, hav- Witnesses: ing thelongitudinal opening 0, the thermome- HERBERT KNIGHT, ter-tube T,projecting through the opening GABRIEL J. W. GALSTER.

